1,720,977 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Las serpientes emplumadas de Chichén Itzá, México, y las etapas de construcción de la Gran Nivelación
No full textABSTRACT The chronology of the pre-colonial city of Chichen Itza is quite controversial. This is due to an old problem that relates to the great amount of literature that has occurred since the discovery of the site on a possible foreign invasion of the called Toltecs, whose capital, Tula, is more than thousand miles away, in the Mexican plateau. Due to the similarity of the architectural structures between both sites, it was long postulated that Chichén Itzá was a Toltec enclave in the Maya area. From the 1980s on, the discussion became heated and what was considered to be Toltec could actually be a style of art, architecture and iconography shared by several urban centers of the Epiclassic, ca. 800-1000 AD, as many in the Mexican highlands as on the Gulf Coast and Mayan area. This article offers arguments that Chichen Itza is a Mayan site and that the chronology of the city can be explained from the iconography of feathered serpents, an important Mesoamerican symbol. Until then studied only under the iconographic scope, it is proposed that there was a cognitive program of architectural construction in Chichén Itzá based on the feather types of the serpents
Invasão tolteca em Chichén Itzá? Uma nova leitura da questão a partir da cultura material das Terras Maias Baixas do Norte
No full textEste artigo trata de uma das questões mais controversas da Arqueologia do México: uma possível invasão tolteca na cidade de Chichén Itzá. O assunto divide opiniões. Para um grupo de pesquisadores, Chichén Itzá é fruto da invasão dos habitantes de Tula, uma cidade do altiplano mexicano, a mais de 100 de distância dela. Já para outros pesquisadores, esta invasão não ocorreu e Chichén Itzá tem seu desenvolvimento dentro de uma tradição maia. Neste texto, mostramos algumas evidências arqueológicas em favor da segunda linha de pesquisa apresentada acima
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